The Impact of Blood Pressure Fluctuations on Frailty in Older Adults
Understanding Blood Pressure Variability and Aging
Blood pressure (BP) fluctuations over time, known as blood pressure variability (BPV), can significantly impact the health of older adults. This study focuses on the long-term effects of BPV on frailty, a condition characterized by decreased physical strength and increased vulnerability to health issues. By examining over 13,000 older individuals, the research seeks to unravel the uncertain relationship between these two critical health aspects.
Insightful Findings from Extensive Analysis
The study employed a thorough secondary analysis of data from participants aged 65-70 years, all enrolled in the ASPREE trial and its follow-up. Researchers measured BPV using the standard deviation of mean BP over three annual visits and assessed frailty using two methods: the Fried phenotype and a frailty deficit accumulation index. Intriguingly, the study found that individuals with higher systolic BPV, which refers to the top number in a blood pressure reading, faced a greater risk of developing frailty. This connection was consistent even after accounting for various factors like medication use, suggesting a direct link between BPV and frailty risk.
Implications for Healthy Aging
The study's conclusions are groundbreaking, revealing that high systolic BPV is an independent risk factor for frailty in otherwise healthy older adults. These findings imply that monitoring BP fluctuations, not just the average BP, could be crucial in assessing and managing health risks in the aging population. This insight opens new avenues for preventative health strategies, emphasizing the importance of regular and detailed blood pressure monitoring in older adults.
Article Information
Long-term blood pressure variability and frailty risk in older adults
Journal of Hypertension. Michelle A Fravel et al.
Abstract
Introduction: In healthy older adults, the relationship between long-term, visit-to-visit variability in blood pressure (BP) and frailty is uncertain.
Methods: Secondary analysis of blood pressure variability (BPV) and incident frailty in >13 000 participants ≥65-70 years enrolled in the ASPirin in Reducing Events in the Elderly (ASPREE) trial and its observational follow-up (ASPREE-XT). Participants were without dementia, physical disability, or cardiovascular disease at baseline. BPV was estimated using standard deviation of mean BP from three annual visits (baseline through the second annual follow-up). Frailty was defined using Fried phenotype and a frailty deficit accumulation index (FDAI). Participants with frailty during the BPV estimation period were excluded from the main analysis. Adjusted Cox proportional hazards regression evaluated the association between BPV and incident frailty, and linear mixed models for change in frailty scores, through a maximum of 9 years of follow-up.
Results: Participants in the highest systolic BPV tertile were at higher risk of frailty compared to those in the lowest (referent) tertile of systolic BPV [Fried hazard ratio (HR) 1.17, 95% confidence interval (CI) 1.04-1.31; FDAI HR 1.18, 95% CI 1.07-1.30]. Findings were consistent when adjusted for multiple covariates and when stratified by antihypertensive use. Linear mixed models showed that higher systolic BPV was associated with increasing frailty score over time. Diastolic BPV was not consistently associated.
Conclusions: High systolic BPV, independent of mean BP, is associated with increased risk of frailty in healthy older adults. Variability of BP across visits, even in healthy older adults, can convey important risk information beyond mean BP.
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